EP 0844706 A2 19980527 - Optical amplifier and laser light generating apparatus
Title (en)
Optical amplifier and laser light generating apparatus
Title (de)
Optischer Verstärker und Einrichtung zum Erzeugen von Laserlicht
Title (fr)
Amplificateur optique et appareil pour la génération de lumière laser
Publication
Application
Priority
JP 31050896 A 19961121
Abstract (en)
In order to prevent two pumping lasers (54,56) from overlapping in oscillation wavelength due to injection locking by return light in a apparatus using double pumping lasers, the apparatus is configured to enter optical outputs from the pumping lasers into a fiber grating (60) using a PANDA fiber through a half mirror and to reflect them back to the pumping lasers. The fiber grating has two main axes whose reflective wavelengths lambda 1, lambda 2 are different only by approximately 0.4 nm, and locks the laser oscillation wavelength of one of the pumping lasers to the wavelength lambda 1 and the laser oscillation wavelength of the other pumping laser to the wavelength lambda 2. Light passing through the fiber grating is entered into erbium-doped optical fibers (48U,48D) through a 3 dB coupler and WDM couplers (50U,50D) to excite the erbium-doped optical fibers.
IPC 1-7
IPC 8 full level
H01S 3/10 (2006.01); H01S 3/06 (2006.01); H01S 3/067 (2006.01); H01S 3/094 (2006.01); H01S 5/06 (2006.01); H01S 5/40 (2006.01); H04B 10/25 (2013.01); H04B 10/2537 (2013.01); H04B 10/29 (2013.01); H04B 10/293 (2013.01); H04B 10/297 (2013.01); H04B 10/564 (2013.01); H04B 10/572 (2013.01); H01S 5/14 (2006.01)
CPC (source: EP)
H01S 3/094003 (2013.01); H01S 5/40 (2013.01); H01S 3/094096 (2013.01); H01S 5/141 (2013.01); H01S 5/146 (2013.01)
Designated contracting state (EPC)
FR GB
DOCDB simple family (publication)
EP 0844706 A2 19980527; EP 0844706 A3 19990203; JP 3327148 B2 20020924; JP H10154960 A 19980609
DOCDB simple family (application)
EP 97119091 A 19971031; JP 31050896 A 19961121